Lock attachment.



PATENTED MAY '7, 1907,.

A. B; BENNETT. LOCK ATTACHMENT. APPLICATION FILED APR. 13,1906.

vnsmucm :ws NORRIS ABIJAH BENJAMIN BENNETT, OF OPELIKA, ALABAMA.

LOCK ATTACHMENT.

Specification of Letters Patent.

Patented May '7', 1907.

Application filed April 13, 1906. serial N 311.551.

To alt who/1t it 'l'l'l/LLZ/ concern:

Be it known-that I, ABIJAH BENJAMIN BENNETT, a citizen of the United States, residing at Opelika, in the county of Lee and State of Alabama, have invented new and useful Improvements in Look Attachments, of which the following is a specification.

This invention relates to improvements in look attachments, and more particularly to an attachment designed to prevent the operation of the look by an unauthorized person.

The invention comprises broadly a shutter movable to a position to extend across the key hole of the lock, and check controlled means for moving said shutter to permit the introduction of a key into said key hole.

In the drawings accompanying the speciiication, wherein a preferable embodiment of my invention is shown and wherein like numerals of reference refer to similar parts in the several views, Figure 1 is a perspective view of my improved attachment secured to a door, Fig. 2 is a rear elevation of the device, with the back plate thereof removed, Fig. 3 is a detail view of the swinging shutter and, Fig. 4 is a side elevation of a modified form of my device.

Referring now more particularly to the drawings, A designates a box like member which is designed to be secured to a door over the lock thereof, and which is divided by a horizontally disposed partition into an'upper compartment B and a lower compartment C. The front and rear walls of the upper compartment B are provided with key holes 5 therein, wh ch are, when the device is secured in position upon the door, in alinement with the key hole of the door lock.

D designates a vertically swinging shutter, which is pivotally secured. within the upper compartment of the device and is adapted to normally extend over the key hole I) in the front wall thereof, said shutter being maintained in its normal position by a spring d, which bears against the lower end thereof. The edge of the shutter farthest from the spring (Z is provided with an inwardly extending notch (Z and the portions of the shut- 'ter adjacent said notch are beveled outwardly toward the front plate of the upper compartment. When the shutter is in its normal position, the notch d therein is positioned at one side of the key hole I) in the front plate of the upper compartment B.

E designates a coin chute which is positioned within the upper compartment B at one side of the shutter D and communication to which is afforded by a slot 5 formed in the top of the compartment B. The edge of the coin chute E constitutes a stop to limit the movement of the shutter D in one direction. Movement of the shutter I) in the opposite direction is normally prevented by a latch 11 which is pivotally secured to the rear face thereof and the lower end of which is normally maintained by gravity against a stop d secured in the upper compartment. The

opposite end of the latch d is provided with a laterally extending portion (1 which projects through a cut away portion of the coin chute so as to be engaged by a coin passing therethrough.

A slot t which is formed in the horizontally disposed partition, at one side of the coin chute E, afiords a communication between the upper and lower compartments, said slot being normally covered by the lower end of the shutter D.

WVith the device secured to a door, when a coin is deposited in the coin chute IE, it will upon descending engage the laterally extending portion. d of the latch and raise the opposite end thereof above the stop (Z andthe further downward movement of the coin will cause the shutter to move laterally against the tension of the spring d to bring the inwardly extending notch (Z therein opposite the key hole 6, the coin being held between the lower part of the shutter and the lower edge of the coin chute. If new, a key is introduced into the key hole I), the end thereof will first engage the beveled portion of the shutter D adjacent the notch d therein, which will cause the shutter D to be swung laterally to completely clear the key hole so that the key may be introduced into the door lock. The lateral movement im parted to the shutter by the introduction of the key also serves to release the coin and permit the same to drop through the slot 1) and into the lower compartment C. A door C of any suitable construction, is secured in the front plate of the device to afford access to the lower compartment C. It will be obvious that as soon as the key is withdrawn from the key hole B the spring 66 will return the shutter D to its normal position and the latch (Z will again drop behind the stop (1 Where it is designed to employ the device on doors, which are not already provided with locks, the lock is made a unitary part of the device, as is shown in Fig. 4. In this form of the device the lower compartment 0 is made somewhat wider than in the form illustrated in Fig. 1, in order that the lock F may be secured thereabove in rear of the upper compartment B. This form of my invention is adapted to be secured directly to the door, it being simply necessary to secure to the door jamb akeeper for the bolt of the look.

I do not desire to limit myself to the precise form of construction shown in the drawings, as it is obvious. that many minor changes may be made thereto without departing from the spirit of the invention.

What I claim is:

1. In a coin controlled look, a coin chute, a shutter positioned at one side of said chute I and normally obstructing the key hole of said lock, said shutter being positioned so as to be engaged by a descending coin and shifted to permit the introduction of a key into the key hole of the lock, and coin controlled means for normally preventing movement of said shutter.

2. In a coin controlled lock, a coin chute, a shutter movably secured at one side thereof, said shutter serving to normally obstruct the key hole of the lock and having a portion projecting within the path of the coin descending a chute, and a latch for normally preventing movement of said shutter, said latch having a portion adapted to be engaged by a descending coin.

3. In a coin controlled lock, a coin chute, a pivoted shutter positioned at one side thereof, said shutter serving to normally obstruct the key hole of the lock and having a portion projecting within the path of the coin chute, a spring for holding the shutter in its normal position, and a latch normally preventing movement of said shutter, said latch having a portion projecting Within the coin chute.

4. In a coin controlled look, a coin chute, a shutter movably secured at one, side thereof and normally serving to obstruct the key hole of the lock, said shutter having a beveled portion adapted to be brought opposite the key hole when the same is deflected by a descending coin.

5. In a coin controlled look, a coin chute, a shutter pivotally secured at one side thereof and adapted to normally obstruct the key hole of the lock, said shutter havin a portion adapted to be engaged by a coin descending said chute and a beveled recessed portion adapted to be moved adjacent the key hole of the lock when said shutter is so engaged, and a spring for holding said shutter in its normal position.

6. An attachment for locks comprising a casing adapted to be secured thereover, means carried by the casing adapted to normally obstruct the key hole of the lock, and check controlled means within the casing for releasing said first mentioned means.

7. An attachment for locks comprising a casing adapted to be secured thereover a movable shutter within the casing normally obstructing the key hole of the lock, and check controlled means within the casing for releasing said shutter.

8. An attachment for locks comprising a casing adapted to be secured thereover, said casing having a key hole therein in alinement with the key hole of the lock, means within the casing and normally obstructing the key hole thereof and check controlled means housed by said casing for releasing said first mentioned means.

9. An attachment for looks comprising a casing adapted to be secured thereover, said casing having a key hole therein in alinement with the key hole of the lock, a movable shutter within the casing and normally obstructing the key hole thereof, and check controlled means housed by said casing for releasing said shutter.

10. In-a coin-controlled look, a casing divided into two compartments and having a key-hole in the upper compartment, a coin chute in the upper compartment communicating at its lower end with the lower cornpartment, and a shutter pivotally secured at one side of said coin chute and normally obstructing the key hole of the casing and the communication between the upper and lower compartments thereof, said shutter having a portion adapted to be engaged by a coin descending the chute.

11. In a coin-controlled look, a casing divided into two compartments and having a key hole in the upper compartment, a coin chute in the upper compartment communicent the key hole when said shutter is deflected by a descending coin.

12. In a coin controlled lock, a coin chute, a shutter positioned at one side thereof, said shutter serving to normally obstruct the key hole of the lock and having a portion In testimony whereof I afl'lx my signature, projecting Within the path of the coin chute, in presence of two subscribing Witnesses. and a latch plvoted to said shutter and co-op ABUAH BENJAMIN BENNETT.

erating with a fixed stop to normally hold said shutter against movement, said latch Witnesses:

having a portion projecting Within the coin WARREN BYERS WATKINs, chute. Jos. L. RENFRo. 

